Kerr偶奇相干态中测量相位算符的压缩  

Squeezing of Measured Phase Operators in Kerr Even and Odd Coherent States

作　　者：田永红[1] 彭金生[2] 徐大海[1] 

机构地区：[1]荆州师范学院物理系,湖北荆州434100 [2]华中师范大学物理系,湖北武汉430079

出　　处：《光电子．激光》2001年第6期635-640,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60078016);湖北省科学研究计划资助项目(99A093)

摘　　要：利用 S.M.Barnett和 D.T.Pegg提出的测量相位算符 ,讨论了 Kerr偶奇相干态中相位的二阶和高阶压缩性质。结果表明 ,在 Kerr偶奇相干态中 ,测量相位算符 cos M 不仅存在周期性的 k阶 cs类压缩 ,而且当 k/ 2为偶数时 ,cos M 还存在 k阶 c N类压缩。压缩程度与 |α| 2 有关 ,对于较小的 |α| 2 ,在 Kerr偶奇相干态中 cos M 的压缩情况相似 ;但当 |α| 2 较小时 ,在 Kerr奇相干态中 cos M 的压缩要浅 。WT5”BZ]:The properties of the two order and higher order squeezing of phase in Kerr even and odd coherent states have been discussed via the measured phase operator introduced by S.M.Barnett and D.T.Pegg.The results exhibit that the measured phase operator cos M has not only periodic k order squeezing in cs type in even and odd coherent states but the k order squeezing in the type of cN when k is even.They also show that the degree of squeezing is relevant with ｜α｜ 2.When ｜α｜ 2 is comparatively big,the squeezing in Kerr even coherent states resembles that in Kerr odd coherent states.Nevertheless,when ｜α｜ 2 is small,the squeezing in Kerr odd coherent states appears shallow,even no squeezing effect occurs. [WT5”HZ]

关 键 词：Kerr偶奇相干态 测量相位算符 量子光学 

分 类 号：O431.2[机械工程—光学工程]